725 lines
17 KiB
C
725 lines
17 KiB
C
/* math2.c --- 2ary math funcs
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*
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* Copyright: 1990, N. Dessipris
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*
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* Author: Nicos Dessipris
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* Written on: 02/05/1990
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* Modified on:
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* 10/12/93 JC
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* - now reports total number of x/0, rather than each one.
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* 1/2/95 JC
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* - rewritten for PIO with im_wrapone()
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* - incorrect complex code removed
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* - /0 reporting removed for ease of programming
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* 15/4/97 JC
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* - return( 0 ) missing, oops!
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* 6/7/98 JC
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* - _vec form added
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* 30/8/09
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* - gtkdoc
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* - tiny cleanups
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* 20/9/09
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* - im_powtra() adapated to make math2.c
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* 12/11/11
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* - redone as a class
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* 17/7/12
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* - wopconst was broken
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* 20/10/21 indus
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* - add atan2
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*/
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/*
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Copyright (C) 1991-2005 The National Gallery
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/*
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <glib/gi18n-lib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <vips/vips.h>
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#include "binary.h"
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#include "unaryconst.h"
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typedef struct _VipsMath2 {
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VipsBinary parent_instance;
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VipsOperationMath2 math2;
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} VipsMath2;
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typedef VipsBinaryClass VipsMath2Class;
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G_DEFINE_TYPE( VipsMath2, vips_math2, VIPS_TYPE_BINARY );
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static int
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vips_math2_build( VipsObject *object )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
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VipsBinary *binary = (VipsBinary *) object;
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if( binary->left &&
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vips_check_noncomplex( class->nickname, binary->left ) )
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return( -1 );
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if( binary->right &&
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vips_check_noncomplex( class->nickname, binary->right ) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_math2_parent_class )->build( object ) )
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return( -1 );
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return( 0 );
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}
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#define LOOP( IN, OUT, OP ) { \
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IN * restrict p1 = (IN *) in[0]; \
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IN * restrict p2 = (IN *) in[1]; \
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OUT * restrict q = (OUT *) out; \
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\
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for( x = 0; x < sz; x++ ) \
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OP( q[x], p1[x], p2[x] ); \
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}
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#define SWITCH( L, OP ) \
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switch( vips_image_get_format( im ) ) { \
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case VIPS_FORMAT_UCHAR: \
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L( unsigned char, float, OP ); break; \
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case VIPS_FORMAT_CHAR: \
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L( signed char, float, OP ); break; \
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case VIPS_FORMAT_USHORT: \
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L( unsigned short, float, OP ); break; \
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case VIPS_FORMAT_SHORT: \
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L( signed short, float, OP ); break; \
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case VIPS_FORMAT_UINT: \
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L( unsigned int, float, OP ); break; \
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case VIPS_FORMAT_INT: \
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L( signed int, float, OP ); break; \
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case VIPS_FORMAT_FLOAT: \
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L( float, float, OP ); break; \
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case VIPS_FORMAT_DOUBLE: \
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L( double, double, OP ); break;\
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\
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default: \
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g_assert_not_reached(); \
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}
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#define POW( Y, X, E ) { \
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double left = (double) (X); \
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double right = (double) (E); \
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\
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/* Special case for **-1 and **0.5, since they are so common. Also \
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* watch for /0. \
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*/ \
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(Y) = (left == 0.0) \
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? 0.0 \
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: (right == -1) \
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? 1.0 / left \
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: (right == 0.5) \
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? sqrt( left ) \
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: pow( left, right ); \
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}
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#define WOP( Y, X, E ) POW( Y, E, X )
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#ifdef HAVE_ATAN2
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#define ATAN2( Y, L, R ) { \
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double left = (double) (L); \
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double right = (double) (R); \
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\
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(Y) = VIPS_DEG( atan2( left, right ) ); \
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if( (Y) < 0.0 ) \
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(Y) += 360; \
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}
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#else
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#define ATAN2( Y, L, R ) { \
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double left = (double) (L); \
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double right = (double) (R); \
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\
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(Y) = vips_col_ab2h( left, right ); \
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}
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#endif
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static void
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vips_math2_buffer( VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width )
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{
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VipsMath2 *math2 = (VipsMath2 *) arithmetic;
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VipsImage *im = arithmetic->ready[0];
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const int sz = width * vips_image_get_bands( im );
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int x;
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switch( math2->math2 ) {
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case VIPS_OPERATION_MATH2_POW: SWITCH( LOOP, POW ); break;
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case VIPS_OPERATION_MATH2_WOP: SWITCH( LOOP, WOP ); break;
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case VIPS_OPERATION_MATH2_ATAN2: SWITCH( LOOP, ATAN2 ); break;
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default:
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g_assert_not_reached();
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}
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}
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/* Save a bit of typing.
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*/
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#define UC VIPS_FORMAT_UCHAR
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#define C VIPS_FORMAT_CHAR
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#define US VIPS_FORMAT_USHORT
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#define S VIPS_FORMAT_SHORT
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#define UI VIPS_FORMAT_UINT
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#define I VIPS_FORMAT_INT
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#define F VIPS_FORMAT_FLOAT
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#define X VIPS_FORMAT_COMPLEX
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#define D VIPS_FORMAT_DOUBLE
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#define DX VIPS_FORMAT_DPCOMPLEX
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/* Type promotion for math2. Keep in sync with math2_buffer() above.
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*/
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static const VipsBandFormat vips_math2_format_table[10] = {
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/* Band format: UC C US S UI I F X D DX */
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/* Promotion: */ F, F, F, F, F, F, F, X, D, DX
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};
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static void
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vips_math2_class_init( VipsMath2Class *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsArithmeticClass *aclass = VIPS_ARITHMETIC_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "math2";
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object_class->description = _( "binary math operations" );
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object_class->build = vips_math2_build;
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aclass->process_line = vips_math2_buffer;
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vips_arithmetic_set_format_table( aclass, vips_math2_format_table );
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VIPS_ARG_ENUM( class, "math2", 200,
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_( "Operation" ),
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_( "Math to perform" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsMath2, math2 ),
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VIPS_TYPE_OPERATION_MATH2, VIPS_OPERATION_MATH2_POW );
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}
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static void
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vips_math2_init( VipsMath2 *math2 )
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{
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}
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static int
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vips_math2v( VipsImage *left, VipsImage *right, VipsImage **out,
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VipsOperationMath2 math2, va_list ap )
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{
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return( vips_call_split( "math2", ap, left, right, out, math2 ) );
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}
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/**
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* vips_math2:
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* @left: left-hand input #VipsImage
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* @right: right-hand input #VipsImage
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* @out: (out): output #VipsImage
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* @math2: math operation to perform
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* @...: %NULL-terminated list of optional named arguments
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*
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* This operation calculates a 2-ary maths operation on a pair of images
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* and writes the result to @out. The images may have any
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* non-complex format. @out is float except in the case that either of @left
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* or @right are double, in which case @out is also double.
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*
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* It detects division by zero, setting those pixels to zero in the output.
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* Beware: it does this silently!
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*
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* If the images differ in size, the smaller image is enlarged to match the
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* larger by adding zero pixels along the bottom and right.
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*
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* If the number of bands differs, one of the images
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* must have one band. In this case, an n-band image is formed from the
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* one-band image by joining n copies of the one-band image together, and then
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* the two n-band images are operated upon.
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*
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* The two input images are cast up to the smallest common format (see table
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* Smallest common format in
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* <link linkend="libvips-arithmetic">arithmetic</link>), and that format is the
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* result type.
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*
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* See also: vips_math2_const().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_math2( VipsImage *left, VipsImage *right, VipsImage **out,
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VipsOperationMath2 math2, ... )
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{
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va_list ap;
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int result;
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va_start( ap, math2 );
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result = vips_math2v( left, right, out, math2, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_pow:
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* @left: left-hand input #VipsImage
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* @right: right-hand input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH2_POW on a pair of images. See
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* vips_math2().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_pow( VipsImage *left, VipsImage *right, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_math2v( left, right, out, VIPS_OPERATION_MATH2_POW, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_wop:
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* @left: left-hand input #VipsImage
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* @right: right-hand input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH2_WOP on a pair of images. See
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* vips_math2().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_wop( VipsImage *left, VipsImage *right, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_math2v( left, right, out, VIPS_OPERATION_MATH2_WOP, ap );
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va_end( ap );
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return( result );
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}
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/**
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* vips_atan2:
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* @left: left-hand input #VipsImage
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* @right: right-hand input #VipsImage
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* @out: (out): output #VipsImage
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* @...: %NULL-terminated list of optional named arguments
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*
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* Perform #VIPS_OPERATION_MATH2_ATAN2 on a pair of images. See
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* vips_math2().
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*
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* Returns: 0 on success, -1 on error
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*/
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int
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vips_atan2( VipsImage *left, VipsImage *right, VipsImage **out, ... )
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{
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va_list ap;
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int result;
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va_start( ap, out );
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result = vips_math2v( left, right, out, VIPS_OPERATION_MATH2_ATAN2, ap );
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va_end( ap );
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return( result );
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}
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typedef struct _VipsMath2Const {
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VipsUnaryConst parent_instance;
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VipsOperationMath2 math2;
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} VipsMath2Const;
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typedef VipsUnaryConstClass VipsMath2ConstClass;
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G_DEFINE_TYPE( VipsMath2Const,
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vips_math2_const, VIPS_TYPE_UNARY_CONST );
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static int
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vips_math2_const_build( VipsObject *object )
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{
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( object );
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VipsUnary *unary = (VipsUnary *) object;
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if( unary->in &&
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vips_check_noncomplex( class->nickname, unary->in ) )
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return( -1 );
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if( VIPS_OBJECT_CLASS( vips_math2_const_parent_class )->
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build( object ) )
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return( -1 );
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return( 0 );
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}
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#define LOOPC( IN, OUT, OP ) { \
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IN * restrict p = (IN *) in[0]; \
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OUT * restrict q = (OUT *) out; \
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double * restrict c = uconst->c_double; \
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\
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for( i = 0, x = 0; x < width; x++ ) \
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for( b = 0; b < bands; b++, i++ ) \
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OP( q[i], p[i], c[b] ); \
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}
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static void
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vips_math2_const_buffer( VipsArithmetic *arithmetic,
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VipsPel *out, VipsPel **in, int width )
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{
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VipsUnaryConst *uconst = (VipsUnaryConst *) arithmetic;
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VipsMath2Const *math2 = (VipsMath2Const *) arithmetic;
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VipsImage *im = arithmetic->ready[0];
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int bands = im->Bands;
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int i, x, b;
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switch( math2->math2 ) {
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case VIPS_OPERATION_MATH2_POW:
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SWITCH( LOOPC, POW );
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break;
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case VIPS_OPERATION_MATH2_WOP:
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SWITCH( LOOPC, WOP );
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break;
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case VIPS_OPERATION_MATH2_ATAN2:
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SWITCH( LOOPC, ATAN2 );
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break;
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default:
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g_assert_not_reached();
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break;
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}
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}
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static void
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vips_math2_const_class_init( VipsMath2ConstClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *object_class = (VipsObjectClass *) class;
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VipsArithmeticClass *aclass = VIPS_ARITHMETIC_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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object_class->nickname = "math2_const";
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object_class->description =
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_( "binary math operations with a constant" );
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object_class->build = vips_math2_const_build;
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aclass->process_line = vips_math2_const_buffer;
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vips_arithmetic_set_format_table( aclass, vips_math2_format_table );
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VIPS_ARG_ENUM( class, "math2", 200,
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_( "Operation" ),
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_( "Math to perform" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsMath2Const, math2 ),
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VIPS_TYPE_OPERATION_MATH2, VIPS_OPERATION_MATH2_POW );
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}
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static void
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vips_math2_const_init( VipsMath2Const *math2_const )
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{
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}
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static int
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vips_math2_constv( VipsImage *in, VipsImage **out,
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VipsOperationMath2 math2, const double *c, int n, va_list ap )
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{
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VipsArea *area_c;
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double *array;
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int result;
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int i;
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area_c = vips_area_new_array( G_TYPE_DOUBLE, sizeof( double ), n );
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array = (double *) area_c->data;
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for( i = 0; i < n; i++ )
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array[i] = c[i];
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result = vips_call_split( "math2_const", ap, in, out, math2, area_c );
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vips_area_unref( area_c );
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return( result );
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}
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/**
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* vips_math2_const: (method)
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* @in: input image
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* @out: (out): output image
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* @math2: math operation to perform
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* @c: (array length=n): array of constants
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* @n: number of constants in @c
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* @...: %NULL-terminated list of optional named arguments
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*
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* This operation calculates various 2-ary maths operations on an image and
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* an array of constants and writes the result to @out.
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* The image may have any
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* non-complex format. @out is float except in the case that @in
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* is double, in which case @out is also double.
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*
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* It detects division by zero, setting those pixels to zero in the output.
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* Beware: it does this silently!
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*
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* If the array of constants has just one element, that constant is used for
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* all image bands. If the array has more than one element and they have
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* the same number of elements as there are bands in the image, then
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* one array element is used for each band. If the arrays have more than one
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* element and the image only has a single band, the result is a many-band
|
|
* image where each band corresponds to one array element.
|
|
*
|
|
* See also: vips_math2(), vips_math().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_math2_const( VipsImage *in, VipsImage **out,
|
|
VipsOperationMath2 math2, const double *c, int n, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, n );
|
|
result = vips_math2_constv( in, out, math2, c, n, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_pow_const: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: (array length=n): array of constants
|
|
* @n: number of constants in @c
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_POW on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_pow_const( VipsImage *in, VipsImage **out, const double *c, int n, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, n );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_POW, c, n, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_wop_const: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: (array length=n): array of constants
|
|
* @n: number of constants in @c
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_WOP on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_wop_const( VipsImage *in, VipsImage **out, const double *c, int n, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, n );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_WOP, c, n, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_atan2_const: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: (array length=n): array of constants
|
|
* @n: number of constants in @c
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_ATAN2 on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_atan2_const( VipsImage *in, VipsImage **out, const double *c, int n, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, n );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_ATAN2, c, n, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_math2_const1: (method)
|
|
* @in: input image
|
|
* @out: (out): output image
|
|
* @math2: math operation to perform
|
|
* @c: constant
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* This operation calculates various 2-ary maths operations on an image and
|
|
* a constant. See vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_math2_const1( VipsImage *in, VipsImage **out,
|
|
VipsOperationMath2 math2, double c, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, c );
|
|
result = vips_math2_constv( in, out, math2, &c, 1, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_pow_const1: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: constant
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_POW on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_pow_const1( VipsImage *in, VipsImage **out, double c, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, c );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_POW, &c, 1, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_wop_const1: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: constant
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_WOP on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_wop_const1( VipsImage *in, VipsImage **out, double c, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, c );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_WOP, &c, 1, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|
|
|
|
/**
|
|
* vips_atan2_const1: (method)
|
|
* @in: left-hand input #VipsImage
|
|
* @out: (out): output #VipsImage
|
|
* @c: constant
|
|
* @...: %NULL-terminated list of optional named arguments
|
|
*
|
|
* Perform #VIPS_OPERATION_MATH2_ATAN2 on an image and a constant. See
|
|
* vips_math2_const().
|
|
*
|
|
* Returns: 0 on success, -1 on error
|
|
*/
|
|
int
|
|
vips_atan2_const1( VipsImage *in, VipsImage **out, double c, ... )
|
|
{
|
|
va_list ap;
|
|
int result;
|
|
|
|
va_start( ap, c );
|
|
result = vips_math2_constv( in, out,
|
|
VIPS_OPERATION_MATH2_ATAN2, &c, 1, ap );
|
|
va_end( ap );
|
|
|
|
return( result );
|
|
}
|